A Practical, Metal-Free Synthesis of 1<i>H</i>-Indazoles
作者:Carla M. Counceller、Chad C. Eichman、Brenda C. Wray、James P. Stambuli
DOI:10.1021/ol800053f
日期:2008.3.1
The synthesis of 1H-indazoles is achieved from o-aminobenzoximes by the selective activation of the oxime in the presence of the amino group. The reaction occurs with a variety of substituted o-aminobenzoximes using a slight excess of methanesulfonyl chloride and triethylamine at 0-23 degrees C and is amenable to scale-up. The synthesis of 1H-indazoles under these conditions is extremely mild compared
A novel and efficient methodology for the construction of quinazolines based on supported copper oxide nanoparticles
作者:Jintang Zhang、Chenmin Yu、Sujing Wang、Changfeng Wan、Zhiyong Wang
DOI:10.1039/c002454f
日期:——
A series of quinazolines were synthesized from 2-aminobenzophenones and benzylic amines in good to excellent yields by employing a new heterogeneous catalyst based on the copper oxide nanoparticles supported on kaolin.
The first Pd/C‐catalyzedoxidative C(sp3)−H bond amination of o‐nitroacetophenones with benzylamines or amino acids proceeding through C−N bond cleavage followed by C−N bond formation by a hydrogen‐transfer strategy was developed. These transformations proceeded smoothly in water to afford the desired quinazolines in moderate to good yields. This protocol has a broad substrate scope and good tolerance
A Simple and Efficient Approach to the Synthesis of 2-Phenylquinazolines via sp<sup>3</sup> C−H Functionalization
作者:Jintang Zhang、Dapeng Zhu、Chenmin Yu、Changfeng Wan、Zhiyong Wang
DOI:10.1021/ol100954x
日期:2010.6.18
A facile and novel approach to the synthesis of 2-phenylquinazolines was developed via a tandem reaction following sp(3) C-H functionalization. Twenty-five examples of 2-phenylquinazolines were obtained from easily available 2-aminobenzophenones and benzylic amines with good to excellent yields.